reef: Shutdown the AP before hibernating
reef: Shutdown the AP before hibernating

To support hibernate called from console commands, ectool commands
and key sequence added code to shutdown the AP before hibernating.

BUG=chrome-os-partner:56490
BRANCH=none
TEST=Using console command, ectool command & key sequence verified
     both EC and AP are hibernated.

Change-Id: I7708377596d7d4175a44c202ae2385a239ca3d01
Signed-off-by: Vijay Hiremath <006c712879a3af08bfdb5c2b8491a8b2d5fd73cd@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/379157
Commit-Ready: Vijay P Hiremath <006c712879a3af08bfdb5c2b8491a8b2d5fd73cd@intel.com>
Tested-by: Vijay P Hiremath <006c712879a3af08bfdb5c2b8491a8b2d5fd73cd@intel.com>
Reviewed-by: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec